AGENCEMENT DE VANNE POUR BOUTEILLE DE GAZ

摘要

A flow control valve assembly for a gas cylinder containing gas under pressure comprises a first adjustable valve 11 between the gas inlet 4 and the gas outlet 5 and a second pressure responsive valve 12 in the outlet passage, the second valve having an axis which does not intersect the axis of the first valve. The second valve comprises a pressure chamber 30 which ensures that the valve remains open against the force of spring 28 until pressure drops to a predetermined value. A passageway 33 (Figure 3) communicates between the spring compartment and the atmosphere and can be provided with a filter 36. The invention provides a readily refillable gas cylinder and is designed so that the valves and hence the cylinder contents are not contaminated from the outside.